"595 colour list was set up in 1956. This colour is used as camouflage by being painted on the bottom sides of reconnaissance aircraft to make them less visible from the ground. The colour blue yonder is displayed at right. The source of this colour is the ""Pantone Textile Paper eXtended (TPX)"" colour list, colour #18-3937 TPX—Blue Yonder. Air Force blue Air Force blue colours are a variety of colours that are mostly various tones of the colour azure, the purest tones of which are identified as being the colour of the sky on a clear day. Some ""air force"
"Azure (color) Azure ( ) is a bright cyan-blue color that is often described as the color of the sky on a clear day. On the , ""azure"" (hexadecimal #007FFF) is defined as the color at 210 degrees, i.e., the hue halfway between blue and cyan. In the RGB color model, used to create all the colors on a television or computer screen, azure is created by adding a little green light to blue light. The complementary color of azure is orange. In the X11 color system which became a standard for early web colors, azure is depicted as a"
"is associated with baby boys in Western culture. The first recorded use of ""baby blue"" as a color name in English was in 1892. Displayed at right is the web color sky blue. The first recorded use of ""sky blue"" as a color name in English was in 1728 in the ""Cyclopædia"" of Ephraim Chambers. Prior to the Chambers reference, the color had first been used in 1585 in a book by Nicolas de Nicolay where he stated ""the tulbant of the merchant must be ""skie coloured"""". Deep sky blue is an azure-cyan color associated with deep sky blue. ""Deep"
"blue color. There are four commonly detectable points of zero polarization of diffuse sky radiation (known as neutral points) lying along the vertical circle through the sun. There is essentially no direct sunlight under an overcast sky, so all light is then diffuse sky radiation. The flux of light is not very wavelength dependent because the cloud droplets are larger than the light's wavelength and scatter all colors approximately equally. The light passes through the translucent clouds in a manner similar to frosted glass. The intensity ranges (roughly) from of direct sunlight for relatively thin clouds down to of direct"
"variety of brighter, lighter, or darker tones of blue. Displayed at right is the web colour sky blue. The first recorded use of ""sky blue"" as a colour name in English was in 1728 in the ""Cyclopædia"" of Ephraim Chambers. Displayed at right is the colour aero. The first recorded use of ""aero"" as a colour name in English was in 1920. Displayed at right is the colour wild blue yonder. This Crayola colour was formulated in 2003. It is intended to represent the colour of the sky on a cloudy, stormy day. At right is displayed the colour air"
"sky blue. The Japanese equivalent is known as ""sora iro"" or ""mizudori"", referring to the color of the sky or its reflection on the sea. Bleu celeste (""sky blue"") is a rarely occurring tincture in heraldry (not being one of the seven main colours or metals or the three ""staynard colours""). This tincture is sometimes also called ciel or simply celeste. It is depicted in a lighter shade than the range of shades of the more traditional tincture azure, which is the standard blue used in heraldry. The Italian Wikipedia cites ""Il dizionario dei colori: nomi e valori in quadricromia"""
"Sky blue Sky blue is the name of a colour that resembles the colour of the sky at noon. The entry for ""sky-blue"" in Murray's ""New English Dictionary"" (1919) reports a first sighting of the term in the article on ""silver"" in Ephraim Chambers's ""Cyclopaedia"" of 1728. However, many writers had used the term ""sky blue"" to name a colour before Chambers. For example, we find ""sky blue"" in ""A Collection of Voyages and Travels"" (London: Awnsham and John Churchill, 1704), vol. 2, p. 322, where John Nieuhoff describes certain flowers: ""they are of a lovely sky blue colour, and"
"Shades of azure Azure ( ) is a variation of blue that is often described as the color of the sky on a clear day. On the , ""azure"" (hexadecimal #007FFF) is defined as the color at 210 degrees, i.e., the hue halfway between blue and cyan. In the RGB color model, used to create all the colors on a television or computer screen, azure is created by adding a little green light to blue light. The complementary color of azure is orange. In the X11 color system which became a standard for early web colors, azure is depicted as"
"Bleu celeste Bleu celeste (, ""sky blue"") is a rarely occurring and non-standard tincture in heraldry (not being one of the seven main colours or metals or the three ""staynard colours""). This tincture is sometimes also called ciel or simply celeste. It is depicted in a lighter shade than the range of shades of the more traditional tincture azure, which is the standard blue used in heraldry. Generally considered to be European rather than English or Scottish, after the First World War it started to appear in England in arms and badges relating to the Royal Air Force, though it"
"Ao (color) Ao (""hiragana"" あお; kanji 青; adjective form ) is a Japanese color word that includes what English-speakers would call blue and green. For example, in Japan, blue skies are described as , and green traffic lights are described as . Modern Japanese has a separate word for green, , although its boundaries are not the same as in English. Ancient Japanese did not have this distinction: the word midori only came into use in the Heian period, and at that time (and for a long time thereafter) midori was still considered a shade of ao. Educational materials distinguishing"
"Cerulean Cerulean (), also spelled caerulean, is a shade of blue ranging between azure and a darker sky blue. The first recorded use of ""cerulean"" as a colour name in English was in 1590. The word is derived from the Latin word ""caeruleus"", ""dark blue, blue, or blue-green"", which in turn probably derives from ""caerulum"", diminutive of ""caelum"", ""heaven, sky"". ""Cerulean blue"" is the name of a pigment. The pigment was discovered in the late eighteenth century and designated as cerulean blue in the nineteenth century. At right is displayed the colour cerulean blue. In classical times, the word ""caerulum"""
"sky. The year the first recorded use of ""morning blue"" as a color name in English is unknown. Source of color: ISCC-NBS Dictionary of Color Names (1955)--Color Sample of Morning Blue (color sample #149) The color defined as blue in the RGB color model, X11 blue, is shown at right. This color is the brightest possible blue that can be reproduced on a computer screen, and is the color named blue in X11. It is one of the three primary colors used in the RGB color space, along with red and green. The three additive primaries in the RGB color"
"web color azure - RGB(240,255,255) - which, with a hue of 180 degrees, is a tone of cyan, but follows the artistic meaning of azure as sky blue. Azure (color) Azure ( ) is a bright cyan-blue color that is often described as the color of the sky on a clear day. On the , ""azure"" (hexadecimal #007FFF) is defined as the color at 210 degrees, i.e., the hue halfway between blue and cyan. In the RGB color model, used to create all the colors on a television or computer screen, azure is created by adding a little green light"
"colour from the so called blue-green algae which have been recognised and described since the 18th century and probably before that. Cerulean is a medium blue-green color that is used to represent or symbolize either the sky or the ocean. The first recorded use of ""cerulean"" as a color name in English was in 1590. Teal is a medium blue-green color. It is named after the common teal, a member of the duck family, whose eyes are surrounded by the color. The color ""teal"" has a hue that is exactly halfway between blue and green and a value (brightness) that"
"is the most popular colour, chosen by almost half of both men and women as their favourite colour. The same surveys also showed that blue was the colour most associated with the masculine, just ahead of black, and was also the colour most associated with intelligence, knowledge, calm and concentration. Blue is the colour of light between violet and green on the visible spectrum. Hues of blue include indigo and ultramarine, closer to violet; pure blue, without any mixture of other colours; Cyan, which is midway in the spectrum between blue and green, and the other blue-greens turquoise, teal, and"
"Blue hour The blue hour (from French ) is the period of twilight in the morning or evening, during the civil and nautical stages, when the Sun is at a significant depth below the horizon and residual, indirect sunlight takes on a predominantly blue shade. When the sky is clear, the blue hour can be a colorful spectacle, with the indirect sunlight tinting the sky yellow, orange, red, and blue. This effect is caused by the relative diffusibility of shorter wavelengths (bluer rays) of visible light versus the longer wavelengths (redder rays). During the blue ""hour"", which typically lasts roughly"
"the sky refers to only the lower, more dense portions of the atmosphere. During daylight, the sky appears to be blue because air scatters more blue sunlight than red. At night, the sky appears to be a mostly dark surface or region spangled with stars. During the day, the Sun can be seen in the sky unless obscured by clouds. In the night sky (and to some extent during the day) the Moon, planets and stars are visible in the sky. Some of the natural phenomena seen in the sky are clouds, rainbows, and aurorae. Lightning and precipitation can also"
"Grey Grey (British English) or gray (American English; see spelling differences) is an intermediate color between black and white. It is a neutral or achromatic color, meaning literally that it is a color ""without color."" It is the color of a cloud-covered sky, of ash and of lead. The first recorded use of ""grey"" as a color name in the English language was in AD 700. ""Grey"" is the dominant spelling in European and Commonwealth English, although ""gray"" remained in common usage in the UK until the second half of the 20th century. ""Gray"" has been the preferred American spelling"
"blue with a hint of green, which was ideal for painting skies. It was a favourite background colour of the German painter Albrecht Dürer. Another blue often used in the Middle Ages was called tournesol or folium. It was made from the plant Crozophora tinctoria, which grew in the south of France. It made a fine transparent blue valued in medieval manuscripts. Another common blue pigment was smalt, which was made by grinding blue cobalt glass into a fine powder. It made a deep violet blue similar to ultramarine, and was vivid in frescoes, but it lost some of its"
"which has the appearance of blackness, albeit with a scattering of stars on a clear night. During the day, the sky is seen as a deep blue due to the sunlight reflected on the air. Astronomically speaking, the sky is a celestial sphere–an imaginary dome divided into constellations–where the moon, planets, stars and sun seem to visually move across the sky. Although artists have long painted the sky it was Edward Hopper who first showed us the beauty of the skyscape, sans clouds. In the 1950s, Eric Sloane painted many cloudless skyscapes during his stay in Taos, New Mexico. Another"
"diffuse sky radiation. When the Sun is at the zenith in a cloudless sky, with 1361 W/m above the atmosphere, direct sunlight is about 1050 W/m, and total insolation about 1120 W/m. This implies that under these conditions the diffuse radiation is only about 70 W/m out of the original 1361 W/m. The dominant radiative scattering processes in the atmosphere (Rayleigh scattering and Mie scattering) are elastic in nature, by which light can be deviated from its path without being absorbed and with no change in wavelength. The sunlit sky is blue because air scatters short-wavelength light more than longer"
"red dominates, then oxygen green and nitrogen blue/red, then finally nitrogen blue/red when collisions prevent oxygen from emitting anything. Green is the most common color. Then comes pink, a mixture of light green and red, followed by pure red, then yellow (a mixture of red and green), and finally, pure blue. Bright auroras are generally associated with [[Birkeland current]]s (Schield et al., 1969; Zmuda and Armstrong, 1973), which flow down into the ionosphere on one side of the pole and out on the other. In between, some of the current connects directly through the ionospheric E layer (125 km); the"
"language – adding the colour blue, probably when blue pigments could be manufactured reliably in the culture using that language. Human eyes perceive blue when observing light which has a dominant wavelength of roughly 450–495 nanometres. Blues with a higher frequency and thus a shorter wavelength gradually look more violet, while those with a lower frequency and a longer wavelength gradually appear more green. Pure blue, in the middle, has a wavelength of 470 nanometres. Isaac Newton included blue as one of the seven colours in his first description the visible spectrum, He chose seven colours because that was the"
"a darker shade of ""azzurro"". ""Celeste"" literally means '(the color) of the sky' and can be used as synonym of ""azzurro"", although it will more often be considered a less saturated hue. ' (aquamarine) literally ""sea water"", indicates an even lighter, almost transparent, shade of blue. To indicate a mix of green and blue, Italians might say ""verde "", literally ""water green"". The term ', not common in standard italian and perceived as a literary term, is used in scientific contexts (esp. botany) to indicate a mix of blue, green and gray. Other similar terms are ' and """" (turquoise/teal);"
"and reflects the name for the colour in the language of the French-speaking Anglo-Norman nobles following the Norman Conquest of England. A wide range of colour values is used in the depiction of azure in armory and flags, and in common usage it is often referred to simply as 'blue'. In addition to the standard blue tincture called azure, there is a lighter blue sometimes found that is called bleu celeste or ""sky blue"". Neither azure nor bleu celeste is precisely defined as a particular shade of blue, but azure is consistently depicted in a much darker shade. Sometimes, the"
"the atmosphere. When the sun is just below the horizon, low-level clouds are gray, middle clouds appear rose-colored, and high clouds are white or off-white. Clouds at night are black or dark grey in a moonless sky, or whitish when illuminated by the moon. They may also reflect the colors of large fires, city lights, or auroras that might be present. A cumulonimbus cloud that appears to have a greenish or bluish tint is a sign that it contains extremely high amounts of water; hail or rain which scatter light in a way that gives the cloud a blue color."
"lapis lazuli is displayed at left. ""Lapis Lazuli"" is a color that is a representation of the most common color of lapis lazuli. The traditional color called royal blue is a dark shade of azure. Shades of azure Azure ( ) is a variation of blue that is often described as the color of the sky on a clear day. On the , ""azure"" (hexadecimal #007FFF) is defined as the color at 210 degrees, i.e., the hue halfway between blue and cyan. In the RGB color model, used to create all the colors on a television or computer screen, azure"
"it appears on a bright sunny day. Today the island of Capri is a resort island popular with tourists. The colour name ""deep sky blue"" for this colour did not come into use until the promulgation of the X11 colour list in 1987. The name ""Capri"" is still used for this colour as well as the name ""deep sky blue"". At right is displayed the colour French sky blue, which is the tone of sky blue that is called ""sky blue"" (""bleu ciel"") in the Pourpre.com colour list, a colour list widely popular in France. Spanish sky blue is the"
"green, or yellow, depending upon the level of their pH. It has been observed that the greater the distance between a viewers eyes and mountains, the lighter and more blue or purple they will appear. This phenomenon, long recognized by Leonardo da Vinci and other painters, is called aerial perspective or atmospheric perspective. The more distant the mountains are, the less contrast the eye sees between the mountains and the sky. The bluish color is caused by an optical effect called Rayleigh scattering. The sunlit sky is blue because air scatters short-wavelength light more than longer wavelengths. Since blue light"
"sky is ""xanh"". In Japanese, the word for blue (青 ao) is often used for colours that English speakers would refer to as green, such as the colour of a traffic signal meaning ""go"". (For more on this subject, see Distinguishing blue from green in language) Linguistic research indicates that languages do not begin by having a word for the colour blue. Colour names often developed individually in natural languages, typically beginning with black and white (or dark and light), and then adding red, and only much later – usually as the last main category of color accepted in a"
"sky blue"" is a web color. This color is on the color wheel () halfway between azure and cyan. The traditional name for this color is Capri. The first use of ""Capri"" as a color name in English was in 1920. The color ""Capri"" in general is named for the azure-cyan color of the Mediterranean sea around the island of Capri off Italy, the site of several villas belonging to the Roman Emperor Tiberius, including his imperial residence in his later years, the ""Villa Jovis"". Specifically, the color Capri is named after the color of the Blue Grotto on the"
"different and common words: while ' refers to the color of arterial blood, ' is a red tending towards yellow or the color of clay. Italian distinguishes blue ('), green (') and grey ('). There are also common words for light blue (e.g. the color of the cloudless sky): ' and ', and other for darker shades, e.g. ', indigo. ', the English equivalent of azure, is usually considered a separate basic color rather than a shade of ""blu"" (similar to the distinction in English between red and pink). Some sources even go to the point of defining ""blu"" as"
"Atmospheric optics Atmospheric optics deals with how the unique optical properties of Earth's atmosphere cause a wide range of spectacular optical phenomena. The blue color of the sky is a direct result of Rayleigh scattering, which redirects higher frequency (blue) sunlight back into the field of view of the observer. Because blue light is scattered more easily than red light, the Sun takes on a reddish hue when it is observed through a thick atmosphere, as during a sunrise or sunset. Additional particulate matter in the sky can scatter different colors at different angles, creating colorful, glowing skies at dusk"